Guild Wars 2

The smoke field, if overlapped by a different field tossed down by an ally becomes ignored. ie. Heartseeker through it does not produce stealth, instead gives the proc from the other field.
Mesmer field, water field put down by ele and engi, these all tops priority of the smoke field. Shouldn’t the one we produce ourselves be on top of the table?

Last placed = priority.
Also, if field 1 is smaller than field 2, and we assume that field 2 is in the middle of field 1
Then you’ll proc field 1 first if you enter from the outer area.